Some always know the right moment and whither it calls them; they always perform the nearest duty, and have their stock of knowledge uniformly well in hand. Others bury themselves in thought, and give themselves up to hopes and fears, to plans and projects: they live in the past or in the future, resent being disturbed by the present, and require time and effort to bring themselves back to it. Between the former and the latter are found others, who do indeed note the given and the present, not, however, to take it as it appears, but rather to look beyond, for the purpose of spying what lies concealed behind, or in order to move, displace, interfere, perhaps to distort, ridicule, and caricature. With many the tendency described is merely superficial. They play and tease--a common manifestation of youthful animal spirits. Now the question arises: how much seriousness lies back of the playfulness. How much depth beneath the animated surface? Here temperament enters as a factor. The play of one with a sanguine temperament comes to an end; but where sourness of temper is habitual, there danger threatens, if, as commonly happens, sport turns to earnest. Self-assertion plays a part also, manifesting itself in various ways. It assumes one form in him who has confidence in his strength, physical or mental, and another form in those who know their weakness--with or without the mental reservation as to the future employment of artifice or cunning, and so also with more or less acknowledgment of the superior power or authority. Passionate playing, on the whole, implies little seriousness; but may well indicate sensitiveness and a propensity to freedom from restraint. Prudence in sport is a sign of ability to take the opponent’s point of view, and to foresee his plans. Love of play is far more welcome to the teacher than indolence, or languid curiosity, or gloomy seriousness; it is one of the minor faults, if now and then work is forgotten over a game and time wasted; the situation is more grave, sometimes very grave indeed, where extravagance, or greed of gain, or secretiveness, or bad company is involved. In such cases decided interference on the part of the teacher is necessary. 296. Since courage and rationality grow with increasing years, the faults of mere weakness leave room for hope of improvement, although there is need of an invigorating mode of life, invigorating physically and mentally, and of counsel and reproof in particular instances. Under continued watchful care weak natures improve much more than at first thought would seem to be likely.